دسترسی یکساله به بیش از ۵۰۰ ژورنال روز جهان موجود در سامانه
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Abstracts of the 2020 AANS/CNS Joint Section on Disorders of the Spine and Peripheral Nerves Annual Meeting
doi : 10.3171/2021.3.DSN2020abstracts
Page Range:1–296
Impact of dual-headed pedicle screws on the biomechanics of lumbosacral junction multirod constructs
Jakub Godzik, Bernardo de Andrada Pereira, Anna G. U. Sawa, Jennifer N. Lehrman, Randall J. Hlubek, Brian P. Kelly, and Jay D. Turner
doi : 10.3171/2020.8.SPINE191545
Page Range:691–699
The objective of this study was to evaluate a novel connector design and compare it with traditional side connectors, such as a fixed-angle connector (FAC) and a variable-angle connector (VAC), with respect to lumbosacral stability and instrumentation strain.
Augmented reality–mediated stereotactic navigation for execution of en bloc lumbar spondylectomy osteotomies
Camilo A. Molina, Christopher F. Dibble, Sheng-fu Larry Lo, Timothy Witham, and Daniel M. Sciubba
doi : 10.3171/2020.9.SPINE201219
Page Range:700–705
En bloc spinal tumor resections are technically demanding procedures with high morbidity because of the conventionally large exposure area and aggressive resection goals. Stereotactic surgical navigation presents an opportunity to perform the smallest possible resection plan while still achieving an en bloc resection. Augmented reality (AR)–mediated spine surgery (ARMSS) via a mounted display with an integrated tracking camera is a novel FDA-approved technology for intraoperative “heads up” neuronavigation, with the proposed advantages of increased precision, workflow efficiency, and cost-effectiveness. As surgical experience and capability with this technology grow, the potential for more technically demanding surgical applications arises. Here, the authors describe the use of ARMSS for guidance in a unique osteotomy execution to achieve an en bloc wide marginal resection of an L1 chordoma through a posterior-only approach while avoiding a tumor capsule breach. A technique is described to simultaneously visualize the navigational guidance provided by the contralateral surgeon’s tracked pointer and the progress of the BoneScalpel aligned in parallel with the tracked instrument, providing maximum precision and safety. The procedure was completed by reconstruction performed with a quad-rod and cabled fibular strut allograft construct, and the patient did well postoperatively. Finally, the authors review the technical aspects of the approach, as well as the applications and limitations of this new technology.
Strategies for prevention of rod fracture in adult spinal deformity: cobalt chrome rod, accessory rod technique, and lateral lumbar interbody fusion
Ki Young Lee, Jung-Hee Lee, Kyung-Chung Kang, Sang-Kyu Im, Hae Seong Lim, and Sun Whan Choi
doi : 10.3171/2020.8.SPINE201037
Page Range:706–715
Restoring the proper sagittal alignment in adult spinal deformity (ASD) can improve radiological and clinical outcomes, but pseudarthrosis including rod fracture (RF) is a common problematic complication. The purpose of this study was to analyze the methods for reducing the incidence of RF in deformity correction of ASD.
Surgical outcomes in rigid versus flexible cervical deformities
Themistocles S. Protopsaltis, Nicholas Stekas, Justin S. Smith, Alexandra Soroceanu, Renaud Lafage, Alan H. Daniels, Han Jo Kim, Peter G. Passias, Gregory M. Mundis Jr., Eric O. Klineberg, D. Kojo Hamilton, Munish Gupta, Virginie Lafage, Robert A. Hart, Frank Schwab, Douglas C. Burton, Shay Bess, Christopher I. Shaffrey, and Christopher P. Ames
doi : 10.3171/2020.8.SPINE191185
Page Range:716–724
Cervical deformity (CD) patients have severe disability and poor health status. However, little is known about how patients with rigid CD compare with those with flexible CD. The main objectives of this study were to 1) assess whether patients with rigid CD have worse baseline alignment and therefore require more aggressive surgical corrections and 2) determine whether patients with rigid CD have similar postoperative outcomes as those with flexible CD.
Determining validity, discriminant ability, responsiveness, and minimal clinically important differences for PROMIS in adult spinal deformity
Alvaro Ibaseta, Rafa Rahman, Nicholas S. Andrade, Richard L. Skolasky, Khaled M. Kebaish, Daniel M. Sciubba, and Brian J. Neuman
doi : 10.3171/2020.8.SPINE191551
Page Range:725–733
The aim of this study was to determine the concurrent validity, discriminant ability, and responsiveness of the Patient-Reported Outcomes Measurement Information System (PROMIS) in adult spinal deformity (ASD) and to calculate minimal clinically important differences (MCIDs) for PROMIS scores.
Similar surgical outcomes of the growing rod technique for treatment of early-onset scoliosis with versus without untreated intraspinal anomalies
Hongru Ma, Benlong Shi, Yang Li, Dun Liu, Zhen Liu, Xu Sun, Yong Qiu, and Zezhang Zhu
doi : 10.3171/2020.8.SPINE20785
Page Range:734–740
The aim of this study was to compare the radiological and clinical outcomes of early-onset scoliosis (EOS) patients with or without intraspinal anomalies (IAs) managed with growing rods (GRs), and to evaluate the safety of the GR technique in EOS patients with untreated IAs.
The minimally invasive interbody selection algorithm for spinal deformity
Praveen V. Mummaneni, Ibrahim Hussain, Christopher I. Shaffrey, Robert K. Eastlack, Gregory M. Mundis Jr., Juan S. Uribe, Richard G. Fessler, Paul Park, Leslie Robinson, Joshua Rivera, Dean Chou, Adam S. Kanter, David O. Okonkwo, Pierce D. Nunley, Michael Y. Wang, Frank La Marca, Khoi D. Than, Kai-Ming Fu, and the International Spine Study Group
doi : 10.3171/2020.9.SPINE20230
Page Range:741–748
Minimally invasive surgery (MIS) for spinal deformity uses interbody techniques for correction, indirect decompression, and arthrodesis. Selection criteria for choosing a particular interbody approach are lacking. The authors created the minimally invasive interbody selection algorithm (MIISA) to provide a framework for rational decision-making in MIS for deformity.
Predictors of neurologic outcome after surgery for cervical ossification of the posterior longitudinal ligament differ based on myelopathy severity: a multicenter study
Jun Jae Shin, Hyeongseok Jeon, Jong Joo Lee, Hyung Cheol Kim, Tae Woo Kim, Sung Bae An, Dong Ah Shin, Seong Yi, Keung-Nyun Kim, Do-Heum Yoon, Narihito Nagoshi, Kota Watanabe, Masaya Nakamura, Morio Matsumoto, Nan Li, Sai Ma, Da He, Wei Tian, Kenny Yat Hong Kwan, Kenneth Man Chee Cheung, K. Daniel Riew, Daniel J. Hoh, Yoon Ha, and the Asia Pacific Spine Study Group (APSSG)
doi : 10.3171/2020.8.SPINE20504
Page Range:749–758
The purpose of this retrospective multicenter study was to compare prognostic factors for neurological recovery in patients undergoing surgery for cervical ossification of the posterior longitudinal ligament (OPLL) based on their presenting mild, moderate, or severe myelopathy.
Association of extended duration of sciatic leg pain with worse outcome after lumbar disc herniation surgery: a register study in 6216 patients
Joel Beck, Olof Westin, Helena Brisby, and Adad Baranto
doi : 10.3171/2020.8.SPINE20602
Page Range:759–767
Sciatica is the hallmark symptom of a lumbar disc herniation (LDH). Up to 90% of LDH patients recover within 12 weeks regardless of treatment. With continued deteriorating symptoms and low patient quality of life, most surgeons recommend surgical discectomy. However, there is not yet a clear consensus regarding the proper timing of surgery. The aim of this study was to evaluate how the duration of preoperative leg pain (sciatic neuralgia) is associated with patient-reported levels of postoperative leg pain reduction and other patient-reported outcome measures (PROMs) in a prospectively collected data set from a large national cohort.
Impact of surgeon and hospital factors on surgical decision-making for grade 1 degenerative lumbar spondylolisthesis: a Quality Outcomes Database analysis
Meng Huang, Avery Buchholz, Anshit Goyal, Erica Bisson, Zoher Ghogawala, Eric Potts, John Knightly, Domagoj Coric, Anthony Asher, Kevin Foley, Praveen V. Mummaneni, Paul Park, Mark Shaffrey, Kai-Ming Fu, Jonathan Slotkin, Steven Glassman, Mohamad Bydon, and Michael Wang
doi : 10.3171/2020.8.SPINE201015
Page Range:768–778
Surgical treatment for degenerative spondylolisthesis has been proven to be clinically challenging and cost-effective. However, there is a range of thresholds that surgeons utilize for incorporating fusion in addition to decompressive laminectomy in these cases. This study investigates these surgeon- and site-specific factors by using the Quality Outcomes Database (QOD).
Utility of prediction model score: a proposed tool to standardize the performance and generalizability of clinical predictive models based on systematic review
Jeff Ehresman, Daniel Lubelski, Zach Pennington, Bethany Hung, A. Karim Ahmed, Tej D. Azad, Kurt Lehner, James Feghali, Zorica Buser, James Harrop, Jefferson Wilson, Shekar Kurpad, Zoher Ghogawala, and Daniel M. Sciubba
doi : 10.3171/2020.8.SPINE20963
Page Range:779–787
The objective of this study was to evaluate the characteristics and performance of current prediction models in the fields of spine metastasis and degenerative spine disease to create a scoring system that allows direct comparison of the prediction models.
Intrawound vancomycin application after spinal surgery: a propensity score–matched cohort analysis
Victor Vakayil, Jeremiah Atkinson, Vikram Puram, James J. Glover, James V. Harmon, Catherine L. Statz, David W. Polly Jr., and Robert E. Bulander
doi : 10.3171/2020.8.SPINE201129
Page Range:788–798
Surgical site infection (SSI) following spine surgery is associated with increased morbidity and healthcare costs. In an effort to reduce SSI rates, the application of intrawound vancomycin powder has gained popularity. However, there is limited high-quality evidence to support the safety and efficacy of this practice. The authors sought to determine if intrawound application of vancomycin powder improves 90-day overall SSI rates.
Report of a spinal extradural arteriovenous fistula with double radiculomedullary venous drainage: therapeutic implications and role of intraoperative spinal angiography
Risheng Xu, Lydia Gregg, Sheng-fu Larry Lo, and Philippe Gailloud
doi : 10.3171/2020.8.SPINE20967
Page Range:799–803
Low-flow spinal extradural arteriovenous fistulas (SEAVFs) are frequently misdiagnosed as spinal dural arteriovenous fistulas (SDAVFs), and their true prevalence is unknown. The principal feature distinguishing low-flow SEAVFs from SDAVFs is the location of the shunt, which involves a pouch of epidural plexus in SEAVFs and a radiculomedullary vein (RMV) in SDAVFs. A venous hypertensive myelopathy comparable to the one observed with SDAVFs develops when the arterialized venous pouch of an SEAVF is connected to an RMV. Depending on the size of the epidural pouch, a low-flow SEAVF may uncommonly drain into multiple RMVs. The authors present an observation of a low-flow SEAVF whose double radiculomedullary drainage was revealed only after intraoperative digital subtraction angiography, and they discuss the surgical implications of this anatomical configuration.
Intradural calcium pyrophosphate dihydrate deposition disease: case report
Ananya Chakravorty, Ronald T. Murambi, and Ravi Kumar V. Cherukuri
doi : 10.3171/2020.9.SPINE201010
Page Range:804–807
Calcium pyrophosphate dihydrate (CPPD) crystal deposition disease, also known as pseudogout, is a crystalline arthropathy that usually affects large joints and periarticular tissue. Spinal involvement is rare and is usually limited to extradural articular and periarticular structures. Only one case of intradural disease has been previously reported. The authors report the second known case of intradural CPPD deposition disease. An 81-year-old man presented with an 8-week history of urinary and fecal incontinence on the background of long-standing back pain, lower-limb paresthesia, and a known L1 calcified intradural extramedullary mass. Slow growth of the L1 lesion had been documented over several decades on serial CT and MRI. A T12–L2 laminectomy and gross-total resection of the mass was performed. Histopathology demonstrated polarizing rhomboid-shaped crystals consistent with CPPD deposition disease. The patient had significant improvement in bowel and bladder function 6 months postoperatively and made a full recovery. The pathophysiology of intradural involvement remains uncertain. Further case series are required to clarify the true incidence and prognosis of the condition.
A study of probable benefit of a bioresorbable polymer scaffold for safety and neurological recovery in patients with complete thoracic spinal cord injury: 6-month results from the INSPIRE study
Kee D. Kim, K. Stuart Lee, Domagoj Coric, Jason J. Chang, James S. Harrop, Nicholas Theodore, and Richard M. Toselli
doi : 10.3171/2020.8.SPINE191507
Page Range:808–817
The aim of this study was to evaluate whether the investigational Neuro-Spinal Scaffold (NSS), a highly porous bioresorbable polymer device, demonstrates probable benefit for safety and neurological recovery in patients with complete (AIS grade A) T2–12 spinal cord injury (SCI) when implanted ? 96 hours postinjury.
Letter to the Editor. Metastatic spine disease and outcome predictions
Aymeric Amelot, Louis-Marie Terrier, Ann-Rose Cook, Pierre-Yves Borius, and Bertrand Mathon
doi : 10.3171/2020.12.SPINE202209
Page Range:818
Letter to the Editor. Recurrent disc herniation and spinal instability
Atul Goel
doi : 10.3171/2020.12.SPINE202101
Page Range:819–820
